Press serving mechanism



INVENTOR Walter Siggertlr.

2 Sheets-Sheet l W. S. EGGERT, JR

PRESS SERVING MECHANISM up "Eu Wm ATTORNEY June 24, 1958 Filed Aug. 30,1955 June 24, 1958- w. s. EGGERT, JR

PRESS SERVING MECHANISM 2 Sheets-Sheet 2 Filed Aug. 30, 1955 INVENTORWalter SiqgzrUr.

ATTORNEY PRESSSERVING,MECHANISM 7 Walter S'..Eggert, Jr.,Philadelphimtla, assignor .to The Budd Company, Philadelphia, Pa acorporation of Pennsylvania Application Augustl30, 1955, Serial No.531,441

1 Claim. (Cl. 111-50 This invention relates to press serving mechanismand has for an object the provision of improvements in this art.

One of the particular objects is to provide mechanism which will ejectthe workpiece very rapidly after it has been formed by the press.

Another object is to provide ejecting mechanism which will first movethe workpiece clear of'press parts and then eject it.

Another object is to provide ejecting mechanism which will act withoutsharp blows on the workpiece so as to avoid injuring it. 1

Another object is to provide an ejector having means for locating aworkpiece when fed to the press and for holding it accurately inposition to engage the press parts.

Another object is to provide an ejector having a tilting holder which ismoved to an inclined position when a workpiece is to be ejected.

Another object is to provide an ejector having a pushout element whichis maintained closely adjacent the workpieceand which is made as areplaceable part and of a material which will not injure the press if itaccidentally gets between the dies.

The above and other objects and advantages of the invention will beapparent from the following description of an exemplary embodiment,reference beingmade to the accompanying drawings, wherein:

Fig. 1 is a plan view of the ejector mechanism alone and showing aworkpiece in chain lines;

Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1 and showingthe blank and parts of a press with the press closed;

Fig. 3 is a view like Fig. 2 but showing the press in partly openposition and the workpiece being removed;

Fig. 4 is a transverse vertical section taken on the line 44 of Fig. 1;and

Fig. 5 is a transverse vertical section taken on the line 5-5 of Fig. 1.

The press with which the present serving mechanism is illustratedcomprises abase 10, a lower die 11, and an upper die 12 carried by a ramso as to have reciprocatory movement from and toward the lower die.

The particular article or workpiece on which the press operates is a hubdrum W having an end disk Wa secured in the cast drum proper Wb. Whenthe drum is cast around the outer edges of the disk it causesdeformation of the disk so it is necessary to give the disk a restrikestroke in the finishing dies to straighten and true it.

The serving mechanism with which the present invention isparticularlyconcerned comprises a slide 15 which has the general shape of anelongated horseshoe and which is mounted toward-the oiftake open end onpivots 16 carried by bearings mounted on the press base. A flange We ofthe drum rides on the sides of the slide and when the slide is raised atthe front end to clear the drum from the lower die after the upper diehas reice tractedi enough for clearance the drum. may move oh theopen.outer end of the slide to any desiredreceiving means. For exampleit may be deposited upona travelling conveyor which will take it away.

Means are provided. for raising the front end of the slide, the meanshereshown comprising alift 17 in the form of an air cylinder carried bypivots. 18 on bearings 19. mounted on the press base and having apistonrod 20'piv otally connected by a journal means 21 and bearing brackets22. to the frontendof the Slide.

Means are provided on the slide for positively and quickly forcing theworkpiece off the slide when the slide has been moved up sufiiciently toclear the workpiece from the die, the means here shown comprising apush-off device 25 in the form of an air cylinder secured beneath theslide and having a piston rod 26 for acting upon the workpiece. The tip27 of the piston rod which stands closely adjacent the side of the drummay be formed of a material such as nylon which is resilient and softerthan the drum so that it will not injure the drum and which will have avery long life. There is another advantage in using a compressiblenon-metallic material and that is that the press will not be injured ifit should by chance close on the tip. The tip is made detachable, as bybeing screwed on the piston rod so as to be readily replaceable ifinjured or worn; Since the tip is located close to the side of theworkpiece it does not act with a hammer blow to injure the workpiece.

A shock absorbing element 30, as of Fabreeka, may be used for cushioningthe drop of the slide.

In operation, a drum is placed by a Workman in the front end of the slotin the slide and pulled forward until it seats properly in the lowerdie, the slide being down in its lower position. When the drum is seatedin the die its flange stands clear a short distance above the slide.

The press operates to re-shape the disk or head of the drum and as theupper die withdraws the lift 17 acts to raise the front end of the slideto clear the drum from the lower die. .When the slide is at the top ofits stroke, normally while the ram is still rising, the pushoff device25 acts to force the drum rapidly off the outer end of the slide. Thepush-off device then withdraws and the lift lowers the slide ready for anew drum to be fed in before the press acts again. For safety, theoperator is required to push the run button on the press but thedischarge and feeding actionsare so rapid that there may be practicallyno pause in the action of the press.

It is thus seen that the invention provides simple, eificient andquick-acting means for forcibly ejecting workpieces in order that thepress may work rapidly and effectively. One workman is eliminated and itis not necessary to reach in and lift out the finished workpiece withthe danger and fatigue which were formerly entailed. The serving deviceis simple and unitary in nature and may be quickly removed by taking outthe slide hinge pins and the lower pivot pin of the lift. The air hoselines are readily disconnected in known manner. For simplicity they havebeen omitted from the drawings as have the electrical connections andthe connections with the press controls since these can be readilyunderstood without illustration.

While one embodiment of the invention has been described by Way ofillustration it is to be understood that there may be variousembodiments within the general scope of the invention.

What is claimed is:

Press serving apparatus comprising in combination with the relativelymovable dies of a vertical-axis press,

the slide having a portion :Jshaped to position and hold a workpiecewhile being operated upon, by the dies and an jopen channel extendingaway'ffrdm the positionin'g'portionj alongwhich a workpiece can slideout .of the press a lift connected to the free end: of v the slideadjacent the o ut 'of' forming position in the dies and holding 'it on aslope, and ejecting means mounted at the" positioning portion at thefree end "of the slide and including anejector the slide is tilted up.

a slide'hing ed at one end awy from the dies to permit the partof theslide at the dies to move up ariddown,

positioningportion foriraising it to lift a workpiece References Citedin the file of this patent UNITED STATES PATENTS Taylor L Jan. 1,Townsend L. Apr. 16, Dinzl -2 May 21, Butterfield Dec. 2, Franz .Q Aug.19, Rund Dec. 23, Ingersoll" Feb. 2, Weyrnotithet al. Nov. 23, Kay Aug.13,

' FOREIGN PATENTS Germany June 1,

